Question

In order to permit the emergence of the maximum number of photons in an LED, the conducting surface___________

a. Must be rough
b. Must be smooth
c. Must be colored
d. Must be transparent

Answer 1

The conducting surface of an LED must be smooth to permit the emergence of the maximum number of photons.

Step-by-step explanation:

In order to permit the emergence of the maximum number of photons in an LED, the conducting surface must be smooth. A smooth surface transmits light, but does not reflect it. Therefore, a smooth surface allows the photons to escape the LED and be emitted as light.